4pca3 + Sp94?

[Soulburner]

I think this may pose a potential problem but i'm not sure. This is the board I am going to try out, but I noticed one thing that is different about it.

http://www.hardocp.com/image.html?image=MTA1NzczMzE4Nndla3MwMzZ1WmtfMV83X 2wuanBn

Look at the direction which the mounting bracket is oriented. That means the screw holes in the board are different also. This means that to mount an SP94 (best heatsink there is) the heatpipes would not be in their normal position, but flipped 90 degrees.

Now, since heat rises, naturally the heatpipes would work best pointing at the top of the case so they can best distribute their heat throughout the heatsink. Those that have seen an SP94 know what i'm talking about. www.thermalright.com - if you haven't.

The question is, would this sideways mounting of the heatsink be detrimental to its performance?

[Soulburner]

Nevermind, false alarm. I found the heatsink mounts fine, if you look at the holes on the bottom of it.
http://www.systemcooling.com/images/reviews/Heatsinks/Thermalright_SP-94/Image3.jpg

I only noticed this because [H] noted that it was unique. Well, I looked at my ASUS and its the same way. :rolleyes:

[althes]

Tell us how it goes.

[eva2000]

no probs hear with 4PCA3+ rev 1.1 and SP-94 with 92x38mm sunon 120cfm fan
- if you read the manual and online instal instructions for 4pca3+ having the SP-94 heatpips facing the NB heatsink is okay

edit: okay that pic is different from my 4pca3+

guess from this pic, the sideway orientation is 2nd best

http://www.thermalright.com/a_images/sp94/SP94_Heatpipe_Orientation_i.gif

[Soulburner]

So that pic is saying if you had the heatsink mounted horizontally, like in the old desktop cases, it would work better than in ATX form factor? I'm assuming that view is from the back of the case?

[eva2000]

yup horizontal mount is best - i have my 4pca3+ + SP94 in an Accent HT200S desktop case http://www.fileshosts.com/accent_HT200S/1/ :)

[dioSRL]

on the pca3+ the only good way to mount the sp-94 is with the heatpipes heading down, on a standart ATX tower.. I was also scared at the beginning :)

[Soulburner]

Originally posted by dioSRL
on the pca3+ the only good way to mount the sp-94 is with the heatpipes heading down, on a standart ATX tower.. I was also scared at the beginning :)
Other way around, you want them facing up toward the top of the case. Heat rises.

[dioSRL]

facing up toward the top of the case
from the picture attached above, it looks like that is the worse situation.. or I am wrong?

[Soulburner]

Originally posted by dioSRL
from the picture attached above, it looks like that is the worse situation.. or I am wrong?
No, pointing the heatpipes up is the way that 99% of the people with these are going to mount them. Its the picture in the middle.

The picture on the far right shows them pointing down.

[eva2000]

no no.. middle pic is pointing heatpipe down... far right is pointing up ;)

tried SP-94 on

P4C800-E point left pic with heatpipes facing towards front of case

4PCA3+ only one way to point since caps get in way - that is down which is middle pic

piccie from systemcooling.com

http://www.systemcooling.com/images/reviews/Heatsinks/Thermalright_SP-94/Image8.jpg


The Heat Pipe Effect

We’ve discussed the theory behind heat pipe technology before, but for those of you unfamiliar with the concept, a heat pipe is a hollow tube filled with a small amount of liquid that boils at a fairly low temperature. As the fluid heats, it vaporizes and moves upward through the tube, away from the heat source, where it dissipates its heat, condenses back into liquid form, then flows back down to repeat the process. The theory is that a heat pipe can rapidly conduct the heat to an area farther from the source, where it can be more efficiently dissipated.

Some of you may recall something of a controversy surrounding the Cooler Master HHC-001, which was one of the earlier heat pipe CPU cooling efforts. Some reviews had it performing fantastically, near the top of all coolers, while others only rated it average, or in some cases, below average. A considerable amount of discussion (and argument) ensued, and it wasn’t until someone pointed out that the orientation of the heat pipes can alter the heat dissipation properties was it realized that perhaps both camps’ arguments might have merit. Generally speaking, it’s now recognized that heat pipes perform better when they are mounted horizontally than they do when mounted vertically.

The socket layout of our Abit motherboard is such that the heat pipes are mounted vertically, and we were curious as to how much difference it would make if the pipes were horizontal. Now obviously, we couldn’t very well change the way the heat sink or processor socket are mounted, but what we could do, and did, was to change the orientation of the entire case. We tested the system in a variety of positions, and measured the load temperatures in each position.

http://www.systemcooling.com/images/reviews/Heatsinks/Thermalright_SP-94/Image11.gif

(1) Heat pipes vertical – case upright, in normal position
(2) Heat pipes horizontal – rear of case facing downward
(3) Entire heat sink horizontal – case on its side

As we can see from the results, having the heat pipes oriented horizontally does indeed increase heat dissipation, although by a quite small margin. Obviously, the SP-94 is not as profoundly effected by heat pipe position as perhaps the HHC-001 was, but if you have a motherboard with the processor socket oriented in such a way that the SP-94’s heat pipes are horizontal, there is quite possibly a little bit to be gained.




HTH

[Soulburner]

I think you are confusing whats up and whats down.....the middle pic would be "up". The liquid inside the pipes evaporates then travels "up" those pipes (toward the top of the case), then liquifies again when it cools and returns to the origin (which is down).

[eva2000]

oh i see... your up is my down but same middle pic right ? orientation i'm stating is where the heatpipe themselves are facing (curve end)

[dioSRL]

ok I got it (eventually ;)) that's the way I will mount it when I'll change my current slk900..

[btv94]

How about Thermalright SLK-947?
I can use my existing SLK-947 on 4PCA3+.
I'm also waiting for Rev 2.0 to be available for my new system.

Thanks in advance?

[dioSRL]

whats about it?

[btv94]

I would like to know if Thermalright SLk-947 heat sink would fit/work on 4pca3+ motherboard?

SLK-947 is older version before SP94 came out.

Thanks,

[Soulburner]

Yes it would fit its the same thing minus the heatpipes.

[btv94]

Thanks Soulburner,